Sock



FIG. 1 is a front perspective view photograph of a sock of the present disclosure, as worn.

FIG. 2 is a back perspective view thereof.

FIG. 3 is a left side elevation view photograph of the sock of the present disclosure, in flattened form; and,

FIG. 4 is a right side elevation view thereof.

The solid black surface shading in the drawings is used to represent color contrast. 

CLAIM The ornamental design for a sock, as shown and described. 